Remove dict_col_t::dropped

dict_col_t::DROPPED: Magic value for dict_col_t::ind

storage/innobase/dict/dict0mem.cc

@@ -713,9 +713,9 @@ dict_mem_fill_column_struct(
 	dtype_get_mblen(mtype, prtype, &mbminlen, &mbmaxlen);
 	column->mbminlen = mbminlen;
 	column->mbmaxlen = mbmaxlen;
-	column->dropped = false;
 	column->def_val.data = NULL;
 	column->def_val.len = UNIV_SQL_DEFAULT;
+	ut_ad(!column->is_dropped());
 }
 
 /**********************************************************************//**
@@ -1337,8 +1337,7 @@ inline void dict_index_t::instant_add_field(const dict_index_t& instant)
 		DBUG_ASSERT(!icol->is_virtual());
 		if (icol->is_dropped()) {
 			ut_d(n_dropped++);
-			f.col->dropped = true;
-			f.col->ind = 0;
+			f.col->set_dropped();
 			f.name = NULL;
 		} else {
 			f.col = &table->cols[icol - instant.table->cols];
@@ -1596,11 +1595,10 @@ void dict_table_t::construct_dropped_columns(const byte* data)
 	for (unsigned i = 0; i < n_dropped_cols; i++) {
 		dict_col_t&	drop_col = dropped_cols[i];
 		bool		is_fixed = false;
-		drop_col.dropped = true;
+		drop_col.set_dropped();
 
 		while (j < num_non_pk_fields) {
 			if (non_pk_col_map[j++] == 0) {
-				drop_col.ind = j + clust_index->n_uniq + 1;
 				break;
 			}
 		}

storage/innobase/handler/handler0alter.cc

@@ -369,8 +369,7 @@ struct ha_innobase_inplace_ctx : public inplace_alter_handler_ctx
 						(&instant_table->instant
 						 ->dropped[d++])
 						dict_col_t(old_table->cols[i]);
-					drop->dropped = true;
-					drop->ind = 0;
+					drop->set_dropped();
 				}
 			}
 #ifndef DBUG_OFF

storage/innobase/include/dict0mem.h

@@ -587,9 +587,10 @@ struct dict_col_t{
 					this column. Our current max limit is
 					3072 (REC_VERSION_56_MAX_INDEX_COL_LEN)
 					bytes. */
-
-	/** Whether the column has been instantly dropped. */
-	unsigned	dropped:1;
+private:
+	/** Special value of ind for a dropped column */
+	static const unsigned DROPPED = 1023;
+public:
 
 	/** Detach the column from an index.
 	@param[in]	index	index to be detached from */
@@ -649,8 +650,10 @@ struct dict_col_t{
 		DBUG_ASSERT(def_val.len != UNIV_SQL_DEFAULT || !def_val.data);
 		return def_val.len != UNIV_SQL_DEFAULT;
 	}
+	/** Flag the column instantly dropped */
+	void set_dropped() { ind = DROPPED; }
 	/** @return whether the column was instantly dropped */
-	bool is_dropped() const { return dropped; }
+	bool is_dropped() const { return ind == DROPPED; }
 	/** @return whether the column was instantly dropped
 	@param[in] index	the clustered index */
 	inline bool is_dropped(const dict_index_t& index) const;